Remarkable repellency of Ligusticum sinense (Umbelliferae), a herbal alternative against laboratory populations of Anopheles minimus and Aedes aegypti (Diptera: Culicidae)

Table 2 Physical characteristics and repellency against Aedes aegypti of the fresh and stored samples of LHE

LHE samples (temperature/duration)	Physical characteristics			Median complete–protection time (range, hours)^a
LHE samples (temperature/duration)	Appearance	Colour	Odour	Median complete–protection time (range, hours)^a
Fresh sample	Viscous	Light-brown	Aromatic	6.5 (5.0–8.0)
Stored sample
4°C
1 month	Viscous	Light-brown	Aromatic	7.5 (5.0–9.0)
2 months	Viscous	Light-brown	Aromatic	5.25 (3.5–6.5)
3 months	Viscous	Light-brown	Aromatic	4.25 (3.0–6.5)
Ambient temperature (21–35°C)
1 month	Viscous	Dark-brown	Aromatic	7.25 (5.0–10.5)
2 months	Viscous	Dark-brown	Aromatic	6.5 (3.5–8.0)
3 months	Viscous	Dark-brown	Aromatic	5.5 (3.0–6.5)
45°C
1 month	Viscous	Dark-brown	Aromatic	8.0 (4.5–8.5)
2 months	Viscous	Dark-brown	Aromatic	4.25 (3.0–6.5)
3 months	Viscous	Dark-brown	Aromatic	3.5 (2.5–5.5)

ISSN: 1475-2875